Complete Rotary Laser System Ready for the Jobsite
The Spectra Precision LL300N-CR71 is a fully matched rotary laser package built for contractors who need reliable, accurate horizontal reference on demanding job sites. Combining the LL300N self-leveling rotary laser with the CR700 multi-function receiver, a graduated tenths rod, and a heavy-duty tripod, this kit eliminates compatibility guesswork and gets your crew working from day one. Whether you're grading a pad, setting forms, or checking elevation across a large structure, the LL300N-CR71 delivers the precision and range to get it done right.
System Overview & Jobsite Applications
The LL300N operates on Spectra's proven dual-grade platform and self-levels within a ±5° range, projecting a 360-degree horizontal reference plane at up to 800-foot diameter range with the included CR700 receiver. The CR700 detects the beam from both sides of the detector face, provides audible and visual grade indication, and mounts directly to the included rod for hands-free operation. This is a go-to package for site contractors, concrete flatwork crews, utility installers, and landscape grading professionals who need an all-in-one horizontal leveling solution without purchasing components separately.
Key Specifications
- Self-leveling range: ±5° automatic compensation
- Accuracy: ±1/16 inch at 100 feet (±1.5mm at 30m)
- Working diameter: up to 800 feet (244m) with CR700 receiver
- Rotation speed: 150, 300, or 600 RPM selectable
- Scan mode: available for short-range high-visibility applications
- Power source: rechargeable battery pack or 4x AA alkaline batteries
- Battery life: up to 40 hours on alkaline batteries
- Protection rating: IP66 dust and water resistant
- CR700 receiver detection window: 1-1/4 inch (32mm)
- Operating temperature: -4°F to 122°F (-20°C to 50°C)
What's in the Kit
- Spectra Precision LL300N self-leveling rotary laser
- CR700 multi-function laser receiver with rod clamp
- Graduated tenths rod (direct reading, contractor-ready)
- Heavy-duty adjustable tripod
- Rechargeable battery pack and AC charger
- Carrying case for laser and accessories
- Operator's manual and warranty documentation
Job Applications
Site Grading & Earthwork: Set the LL300N on the tripod at a central location and use the CR700 on the rod to check cut/fill across the entire site. The 800-foot working diameter covers most residential and light commercial pads in a single setup.
Concrete Flatwork & Formwork: Establish a consistent elevation reference for slab forming and screeding. The ±1/16" accuracy at 100 feet meets the tolerance requirements for most commercial and residential slab work.
Drainage & Utility Layout: Use horizontal reference to verify pipe inverts, swale grades, and utility trench depths. The rod and receiver combination allows one-person operation without a second set of eyes on a level.
Landscaping & Hardscape Installation: Level patio subgrades, retaining wall courses, and irrigation trenches quickly. The scan mode provides a visible beam arc for shorter-range work in daylight conditions.
Compatible Accessories
- Spectra Precision CR700 Replacement Receiver
- Spectra HL760 Heavy-Duty Laser Receiver
- Aluminum Grade Rod Extensions
- Spectra Precision Laser Detector Clamp
- Replacement Rechargeable Battery Pack for LL300N
- Heavy-Duty Laser Tripod with Quick-Release Head
Related Guides
- How to Set Up a Rotary Laser Level for Site Grading
- Rotary Laser vs. Line Laser: Choosing the Right Tool
- Using a Laser Receiver on a Grade Rod: Tips for One-Person Operation
- Spectra Precision LL300N vs. LL400HV: Which Package Is Right for You?
Frequently Asked Questions
- Does the LL300N-CR71 work for both indoor and outdoor use?
- Yes. The LL300N is rated IP66 for dust and water resistance, making it suitable for outdoor jobsite conditions. For bright outdoor environments, the CR700 receiver is the recommended detection method since the naked beam can be difficult to see in direct sunlight beyond a few feet.
- Can the LL300N be used for vertical or dual-grade applications?
- The LL300N in the CR71 package is configured for horizontal self-leveling use. Spectra does offer dual-grade variants (such as the LL300N-1 and LL400HV) for contractors needing manual grade-matching capability. Contact Express Tools if you need a dual-grade configuration.
- What is the warranty on the Spectra Precision LL300N?
- The LL300N carries a standard Spectra Precision factory warranty. As an authorized dealer, Express Tools ensures your purchase is backed by full manufacturer warranty support. Contact us for current warranty terms and calibration service options.
- Is the CR700 receiver compatible with other Spectra laser models?
- Yes. The CR700 is compatible with most Spectra Precision rotary lasers that operate on a standard 635nm red laser frequency. It can also be used as a standalone receiver upgrade on existing Spectra systems, making it a versatile addition to your equipment inventory.
